505040513 has 4 divisors (see below), whose sum is σ = 505089108. Its totient is φ = 504991920.

The previous prime is 505040483. The next prime is 505040563. The reversal of 505040513 is 315040505.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 395691664 + 109348849 = 19892^2 + 10457^2 .

It is a cyclic number.

It is not a de Polignac number, because 505040513 - 2²² = 500846209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505040563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706 + ... + 31827.

It is an arithmetic number, because the mean of its divisors is an integer number (126272277).

Almost surely, 2^505040513 is an apocalyptic number.

It is an amenable number.

505040513 is a deficient number, since it is larger than the sum of its proper divisors (48595).

505040513 is a wasteful number, since it uses less digits than its factorization.

505040513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48594.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 505040513 is about 22473.1064385857. The cubic root of 505040513 is about 796.3587186709.

The spelling of 505040513 in words is "five hundred five million, forty thousand, five hundred thirteen".